Shoveling snow can take a toll on your body, particularly your heart, and some people have a higher risk for serious complications than others. Weather Watch 4's Ray Petelin explains how to know if you're one of them.

PEOPLE ALL OVER WESTERN PENNSYLVANIA ARE DIGGING THEMSELVES OUT, AN ACTIVITY AS STRENUOUS AS IT IS FRUSTRATING. THAT CAN TAKE SUCH A TOLL ON YOUR BODY, PARTICULARLY YOUR HEART AND SOME PEOPLE HAVE A HIGHER RISK OF SERIOUS COMPLICATIONS. HOW TO RECOGNIZE IF YOU'RE ONE OF THEM. IT'S REAL HEAVY TO PUSH. THAT'S WHY I HAD TO GET A HELPER. Reporter: WITH SNOW WEIGHED DOWN BY WATER AND THE CONSISTENCY OF MASHED POTATOES NO WONDER HE HIRED A HELPER FOR THE 25 HOURSES THAT HE REMOVES SNOW FROM BY HAND. IT'S BACK-BREAKING WORK. I'M 68 SO I'M TRYING TO BE CAREFUL, BUT IT'S GOOD EXERCISE AS LONG AS YOU USE GOOD ACCEPTS AND YOU'RE NOT DOING TOO MUCH. Reporter: OVERDOING IT IS EASY WHILE SHOVELING, BUT ED FORESTER ISN'T YOUR AVERAGE 68-YEAR-OLD. RUN A MARATHON, PLAY ICE HOCKEY AND TRY TO DO AS MUCH AS I CAN, GOOD BLOOD PRESSURE AND IN GOOD HEALTH AND I'M GRATEFUL TO GOD. Reporter: WHILE ED HAS THE ENERGY AND ABILITY TO CLEAR COMPLETELY AROUND THE CORNER MANY YOUNGER THAN HIM HAD NOT THAT FIT. THAT'S WHY HEAVY WET SNOW IS SOMETIMES CALLED HEART ATTACK SNOW. THAT EXERTIONAL ACTIVITY OF SHOVELING ON TOP OF THE COLD WEATHER MAKES YOUR BLOOD VESSELS SMALLER AND MAKES IT DIFFICULT FOR PEOPLE WITH HEART TROBS TROUBLES. Reporter: THOSE MOST AT RISK ARE PEOPLE WITH HEART DISEASE AND KNOWING THE SIGNS OF A HEART ATTACK ARE IMPORTANT. MOST COMMON IS CHEST PAIN AND SHORTNESS OF BREATH AND ANY CHEST PAIN IN SOMEONE WHO THINKS THEY HAVE A PROBLEM STOP IMMEDIATELY. Reporter: IN SOME CASES A PERSON COULD HAVE A HEART ATTACK AND NOT EVEN KNOWING T.PAYING ATTENTION TO YOUR HEALTH AFTER SHOVELING IS KEY, TOO. MOST COMMONLY IT'S JUST THAT THEY ARE WEAK AND TIRED, EXTREME WEAKNESS, GENERAL WEAKNESS AND TIRED. Reporter: ANOTHER PRESCRIPTION FROM THE DOCTOR IS TO PAY ATTENTION TO OTHERS. THIS IS A TIME TO NAG EACH OTHER FOR SPOUSES, ESPECIALLY IF YOU KNOW YOUR SPOUSE HAS HEART DISEASE AND HELP YOUR ELDERLY NEIGHBOR WITH HEART DISEASE AND BE A GOOD NEIGHBOR. Reporter: MIDDLE-AGED PEOPLE ARE MOST AT RISK BECAUSE THEY